Roger Federer

Roger Federer

Photo by Alex Livesey/Getty Images

Roger Federer of Switzerland hits a backhand during the men's singles round four match between Stanislas Wawrinka of Switzerland and Roger Federer of Switzerland on day eight of the French Open at Roland Garros on May 29, 2011 in Paris, France.

Roger Federer of Switzerland hits a backhand during the men's singles round four match between Stanislas Wawrinka of Switzerland and Roger Federer of Switzerland on day eight of the French Open at Roland Garros on May 29, 2011 in Paris, France. (Photo by Alex Livesey/Getty Images)

Roger Federer of Switzerland hits a backhand during the men's singles round four match between Stanislas Wawrinka of Switzerland and Roger Federer of Switzerland on day eight of the French Open at Roland Garros on May 29, 2011 in Paris, France.